Rod-coupling.



C. H. BALDWIN.

ROD COUPLING. APPLICATION FILED uov.21. m1.

INVENTOR C f) H- Balo'wzn. wlmssss i. i BAY/g" Pafented May 7,1918.

CARL H. BALDWIN, 0F FELLOWS, CALIFORNIA.

ROD-COUPLING.

Specification of Letters Patent.

Patented May v, 1918.

Application filed November 21, 1917. Serial No. 203,258.

To all whom it may concern lie it known that I, CARL H. BALDWIN, acitizen ofjhe United States, residing at .Feh lows, in the county ofKern and State of California, have invented certain new and usefulImprovements in Rod-Couplings, of which the following is aspecification.

This invention relates to rod couplings, and more particularly to thosefor connecting sucker rods used in wells.

The object of the invention is to so construet a coupling of thischaracter that rods may be connected tliereby without turning the rodsand which has a joint constructed to prevent them from unscrewing whenin the Well.

Another object is to so construct a cou pling of this character that,swelling of the parts prevented which interferes with the unscrewingthereof and in which all possibility of the entrance of sand isprevented.

With the foregoing and other objects in view, which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed may be made within thescope of what is claimed without departing from the spirit of theinvention.

In the accompanying drawingsz- Figure 1 represents a side elevationpartly in section of a eordance with this invention and shown applied,

Fi 2 is a longitudinal section of one of the sleeves constltuting a partof this invention,

Fig. 3 is an end view thereof,

Fig. 4 is an end view and aside elevation respectively of the enlargedend of the rod to be connected,

Fi 5 is a side elevation of the central mem er of the coupling, and

Fig. 6 is an enchelesetion thereof.

The rod coupling constituting this invention comprises a centralconnecting member 1 and two sleeves 5 and 10. The member 1 hasexteriorly threaded extensions? with ribs 3 at their free ends whichextend transversely thereof, said ribs tapering toward their free edges.Flanges 4 are formed at the bases of the extensions 2 and between theseflanges 4 the member 1 is flattened at diametrically opposite points asshown in coupling constructed in acdotted lines at 1' in Fig: 6 tofacilitate the gripping thereof by a Wrench.

The sleeves 5 and 10 are exactly alike in construction and hence oneonly will be described in detail. The sleeve 5 has an open mg 6 in itsouter end through which one of the rods 11 to be connected extend, ashoulder or seat 7 being formed within said sleeve around said openingSo that the head 12 of said rod end may seat thereon when the parts arein operative position as is shown clearly in Fig. ll This sleeve .3 isinteriorly threaded at its other end as shown at S, the threads thereofex tending about one half the length of the sleeve, more or less.Flanges 9 extend radially from the opposite ends of the sleeve and saidsleeve is preferably flattened at diametrically opposite points as shownat 5 to facilitate the gripping thereof bya wrench when the sleeve is tobe screwed or unscrewed.

The rods 11 to be connected which have the enlarged heads 12 at theirends are providedin said. ends with transversely extending grooves 13which are shaped to conform to the ribs 3 carried by the centralcoupling member 1 and lllWll'lCll said ribs are designed to seat whenthe parts are c0nnected to prevent the rods and said meinher fromturning relatively to each other. It will thus be seen that in the useof this device when the sleeves .3 and 10 have been placed on the endsof the rods 1.1 to be connected, the sleeves are moved backwardly todispose the grooved ends of the heads '12 and permit; them to be engagedwith the ribs 3 of the central connecting member 1. When these parts areso positioned the sleeves 5 and 10 are moved toward each other andscrewed onto the extensions 2 of said member 1 until they assume theposi t-ion shown in Fig. l with the inner ends or bases of the heads 12engaging the seats 7 of said sleeves.

When the parts are so positioned the rods 11 will be'securely andreliably connected and all danger of their becoming separted isprevented, the interlocking engagement of the ribs 3 with the grooves 13operating to prevent all possibility of said rod ends turning withrespect to the central connecting member 1 and a close fit between thesleeve 5 and 10 and the=ends of the rods 11 prevent all possibility ofsand working into the sleeves. Moreover, the sleeves 5 and 10 isdesigned to .are formed of material sufficiently lIQHVytO 1 preventswelling of the parts as it is very objectionable to have this occursince it prevents the unturning or unscrewing of the arts should it forany reason be de air to disassemble them.

From the foregoing description, taken in ooimection with theaccompanying drew-- ings, the advante es of the construction and 40i themethod 0 oration will he readily agparent to those skilled in the art towhich t c invention appertains and while I have described the principleof operation of the invention together with the device which I "nowconsider to be the best embodiment thereof,.l desire to have itunderstood that; the device shown is merely illustrative and that suchchan es may be made as are within the scope 0% the claimed invention.

I claim I. A rod coupling comprising a central member having extensionsat its opposite ends, rods for connection adapted to abut, theextensions of said coupling member, said ends of the rods and saidmember havin interlocking elements to hold them a inst turningrelatively to each other, and s covet carried by said rod ends andengagsaid extensions. 50 "5;

A coupling of the class described coma central member havin reducedexwiu'ly threlded extensions wit ribs extn'nsversely across the freeends having interiorly threaded ends for engageni with said extensionsand openings at their other ends surrounde y 01 the rods to beconnected.

3. A red coupling member hav ng extcriorly sions at its opposite endswith rods he mg heads bases of said extensions,

internal seats to connect with the ends compri ing a central threadedextenstops at the at the ends to be connected, said heads desi nod toabut against the extensions of threaded at one one of said abuttin andthe other a m by Sci (1 rod end to engnge the threaded extensions ofsaid tow pling member.

4. The combination Wltlrt 'o 1( llS to be connected each having anenlarger head at its free end, said heads being g versely; of a centracoupling ing I'lbS to fit in we. grooves of saw l mounted on said rodsends, sleeves to and haw ing seat: at one end t inner ends of the headson said other ends of said sleeves be "oovod transnicmht-r havrod 0engage the rod ends, the lug threaded and the extenslons of said centralmember being threaded for engagement \\lil'1 the threaded portions ofsaid sleeves.

In testimony whereof I afiix in presence of two witnesses,

CARL H. B

Witnesses:

O'rm KRAMER, Cannes H. Monem.

my signature ALDWIN.

